Brain Neurons Quotes & Sayings

Though it accounts for only 2 percent of the body's mass, it uses up a fifth of all the oxygen we breathe, and it's where a quarter of all our glucose gets burned. The brain is the most energetically expensive piece of equipment in our body, and has been ruthlessly honed by natural selection to be efficient at the tasks for which it evolved. One might say that the whole point of our nervous system, from the sensory organs that feed information to the glob of neurons that interprets it, is to develop a sense of what is happening in the present and what will happen in the future, so that we can respond in the best possible way. Strip away the emotions, the philosophizing, the neuroses, and the dreams, and our brains, in the most reductive sense, are fundamentally prediction and planning machines. — Joshua Foer

I think my characters with my fingers, I think my characters with my guts. But when I say I think them, that is what I do, I feel them with the sympathetic neurons and I work out with my brain what it is that I am trying to write about, or I can't do it. — A.S. Byatt

With its billions of interconnected neurons, whose interactions change from millisecond to millisecond, the human brain is an archetypal complex system. — Miguel Nicolelis

Today, when we look at a brain, we see an intricate network of billions of neurons in constant, crackling communication, a chemical labyrinth that senses the world outside and within, produces love and sorrow, keeps our hearts beating and lungs breathing, composes our thoughts, and constructs our consciousness. — Carl Zimmer

Love? Do you mean love in the way you understand it
as a human?"
"Well, not exactly, but basically the same thing. I mean,
love is love."
"A brain surgeon would tell you that a specific part of
the brain controls the ability to love. If it's damaged, people
are incapable of love, incapable of caring about others."
"So?"
"So, isn't it arrogant to think that the love generated by
our little brains is the same thing that an omnipotent being
experiences? If you were omnipotent, why would you limit
yourself to something that could be reproduced by a little
clump of neurons? — Scott Adams

Cell differentiation can turn neurons into everything from clocks that control circadian rhythms to photoreceptors that convert light into electrical-chemical impulses or decision makers that tally votes and decide courses of action. In the retina (often used as a case study because it can be directly and naturally stimulated), there are at least fifty different kinds of neurons specialized to different tasks, such as looking for motion, recognizing colors, detecting objects in low light, and measuring brightness and contrast. In the brain as a whole, there may be as many as 10,000 different kinds of neurons, each contributing to a different aspect of mental life. — Gary F. Marcus

Emotions, particularly strong emotions in people we care about, are contagious. But just as so-called negative emotions are contagious, so are calming and compassionate ones. [...] Mirror neurons in the brain are what cause us to feel the experiences and emotions of people around us. In the classic example, if I am watching you eat a banana, the neurons in my brain that are involved in eating bananas begin to fire. Likewise, if I am sitting across from you and feeling sad or angry, you are likely to have those neurons fire in your brain as well; thus you are *feeling* those emotions yourself, not just detecting them. — Christopher Willard

When you are saying "I", it is actually the billions of neurons in your brain collectively expressing their functional existence. — Abhijit Naskar

Where is the pain when your pride is wounded? And why do we say that: wounded? There is no gash, no blood, not even a scratch. Which part of us hurts? The brain cells? The neurons? What, for goodness' sake, what? — A.P.

There is one brain organ that is optimised for understanding and articulating logical processes and that is the outer layer of the brain, called the cerebral cortex. Unlike the rest of the brain, this relatively recent evolutionary development is rather flat, only about 0.32 cm (0.12 in) thick and includes a mere 6 million neurons. This elaborately folded organ provides us with what little competence we do possess for understanding what we do and who we do it. — Ray Kurzweil

In your body, the gradually accumulating burden of reactive experiences is called allostatic load, which increases inflammation, weakens your immune system, and wears on your cardiovascular system. In your brain, allostatic load causes neurons to atrophy in the prefrontal cortex, the center of top-down executive control; in the hippocampus, the center of learning and memory; and in other regions. It impairs myelination, the insulating of neural fibers to speed along their signals, which can weaken the connectivity between different regions of your brain, so they don't work together as well as they should. — Rick Hanson

When you read a book, the neurons in your brain fire overtime, deciding what the characters are wearing, how they're standing, and what it feels like the first time they kiss. No one shows you. The words make suggestions. Your brain paints the pictures. — Meg Rosoff

Consider a cognitive scientist concerned with the empirical study of the mind, especially the cognitive unconscious, and ultimately committed to understanding the mind in terms of the brain and its neural structure. To such a scientist of the mind, Anglo-American approaches to the philosophy of mind and language of the sort discussed above seem odd indeed. The brain uses neurons, not languagelike symbols. Neural computation works by real-time spreading activation, which is neither akin to prooflike deductions in a mathematical
logic, nor like disembodied algorithms in classical artificial intelligence, nor like derivations in a transformational grammar. — George Lakoff

Even now, when I imagine Einstein's dendrites and neurons firing as his brain lit upon relativity, I picture Baghdad, with its minarets and modern-antennaed buildings sparkling beneath thousands of phantasmagorical tracers, under Allied attack on a very dark night. — Michael Paterniti

A real brain and a three-row neural network are built with neurons, but have almost nothing else in common. During the summer of 1987, — Jeff Hawkins

The number of neurons in the brain is very much larger than the number of components in a computer ... — Jeremy Bernstein

Plaster holo screens against a mountain a full kilometer high, covering it until it glitters with a half million dancing images. Each holo used a quarter of a million pixels to shape its image, so the array musters immense representational power. Now compress those screens on a sheet of aluminum foil a millimeter thick. Crumple it. Stuff it into a grapefruit. That is the brain, a hundred billion neurons firing at varying intensities. Nature had accomplished that miracle, — Gregory Benford

The human brain has 100 billion neurons, each neuron connected to 10 thousand other neurons. Sitting on your shoulders is the most complicated object in the known universe. — Michio Kaku

The brain, or cerebrum, is a material entity located inside the skull which may be inspected, touched, weighed, and measured. It is composed of chemicals, enzymes, and humors which may be analyzed. Its structure is characterized by neurons, pathways, and synapses which may be examined directly when they are properly magnified. — Jose Manuel Rodriguez Delgado

In its evolution from a more primitive nervous system, the brain, as an organ with ten or more billion neurons and many more connections between them must have changed and grown as a result of many accidents. — Stanislaw Ulam

Unless you experience the unpleasant symptoms of being wrong, your brain will never revise its models. Before your neurons can succeed, they must repeatedly fail. There are no shortcuts for this painstaking process. — Jonah Lehrer

In fact, the belief that neurophysiology is even relevant to the functioning of the mind is just hypothesis. Who knows if we're looking at the right aspects of the brain at all. Maybe there are other aspects of the brain that nobody has even dreamt of looking at yet. That's often happened in the history of science. When people say that the mental is the neurophysiological at a higher level, they're being radically unscientific. We know a lot about the mental from a scientific point of view. We have explanatory theories that account for a lot of things. The belief that neurophysiology is implicated in these things could be true, but we have every little evidence for it. So, it's just a kind of hope; look around and you see neurons; maybe they're implicated. — Noam Chomsky

He'd know about the role of mirror neurons in the brain, special cells in the premotor cortex that fire right before a person reaches for a rock, steps forward, turns away, begins to smile.Amazingly, the same neurons fire whether we do something or watch someone else do the same thing, and both summon similar feelings. Learning form our own mishaps isn't as safe as learning from someone else's, which helps us decipher the world of intentions, making our social whirl possible. The brain evolved clever ways to spy or eavesdrop on risk, to fathom another's joy or pain quickly, as detailed sensations, without resorting to words. We feel what we see, we experience others as self. — Diane Ackerman

The human brain has billions of neurons and hundreds of billions of interconnections. It can process more than two million bits of information per second and can remember everything you have ever seen or heard. — Ben Carson

Oh, love is very much a physical thing ... I realize that it's very complicated, and I'm sure it can't be traced to individual neurons and hormones, but I think it's very much a physiological sensation that takes place in the brain. — Alan Lightman

Yogi Bhajan once wrote, "...you are not free by taking drugs. The neurons of the brain will become feeble. You will lose your nostril pituitary sensitivity. You can never smell the subtlety of life. You'll always be dragging your life." With artificial highs, the individual is left enslaved by the need for their next fix. The selfishness to fulfill that need drives many an addict to do unspeakable crimes. Any — Jen Solis

If I ask you, are you conscious right now? You'd go right ahead and tell me - yes. That's because your conscious mind is constructing an awareness in you about everything around you. And underneath that operation of your conscious mind, there are billions of neurons working in proper harmony. — Abhijit Naskar

Deep breathing belly exercises strengthen the abdominal tissues responsible for lung expansion. Taking a few deep breaths periodically is like giving your brain a blast of unexpected oxygen. Your neurons — Robert DeMaria

When a monkey loses a banana to a rival, he feels bad, but he doesn't expand the problem by thinking about it over and over. He looks for another banana. He ends up feeling rewarded rather than harmed. Humans use their extra neurons to construct theories about bananas and end up constructing pain. — Loretta Graziano Breuning

Our brains contain one hundred billion nerve cells (neurons). Each neuron makes links with ten thousand other neurons to form an incredible three dimensional grid. This grid therefore contains a thousand trillion connections - that's 1,000,000,000,000,000 (a quadrillion). It's hard to imagine this, so let's visualise each connection as a disc that's 1mm thick. Stack up the quadrillion discs on top of each other and they will reach the sun (which is ninety-three million miles from the earth) and back, three times over. — Nessa Carey

Mimicking the intricacies of the human brain, a neuro-inspired computer would work in a fashion similar to the way neurons and synapses communicate. It could potentially learn or develop memory. — Nayef Al-Rodhan

For me, the flow of information was an apt metaphor. As surfing became my obsession at a young age, my innovation had been to remap my tactile sense into the water around me. Sitting on my surfboard, bobbing up and down between the swells, I could feel the pressure, shape, and temperature of the water's surface around me through my skin. The thousands of neurons attached to each hair follicle could sense even tiny subsurface eddies and water currents. After nearly twenty years of dedicated practice, my brain had neuroplastically reformatted to devote a large part of itself to my water-sense, and I now had the most highly attuned tactile array of any pssi-kid, or for that matter anyone else in the world. Sitting with my eyes closed, I could feel the water moving and undulating around me as a perfectly natural and integral part of my body. I was one with the water, and it was one with me. — Matthew Mather

All that's known is this: there is no central processor, no single computer. Nothing that simple. Millions of neurons process information simultaneously and in parallel, not linearly, but the actual chemistry and electrical properties of that integrative process are still being mapped. Even so, it seems odd that during the evolution of brain circuitry and thinking, the ability to understand itself did not get wired in. Such built-in innocence seems like a terrible oversight. — Gretel Ehrlich

Case in point: Warnings on cigarette packages can increase a smoker's urge to light up. A 2009 study found that death warnings trigger stress and fear in smokers - exactly what public health officials hope for. Unfortunately, this anxiety then triggers smokers' default stress-relief strategy: smoking. Oops. It isn't logical, but it makes sense based on what we know about how stress influences the brain. Stress triggers cravings and makes dopamine neurons even more excited by any temptation in sight. It doesn't help that the smoker is - of course - staring at a pack of cigarettes as he reads the warning. So even as a smoker's brain encodes the words "WARNING: Cigarettes cause cancer" and grapples with awareness of his own mortality, another part of his brain starts screaming, "Don't worry, smoking a cigarette will make you feel better! — Kelly McGonigal

In my view, while the single neuron is the basic anatomical and information processing-signaling unit of the brain, it is not capable of generating behaviors and, ultimately, thinking. Instead, the true functional unit of the central nervous system is a population of neurons, or neural ensembles or cell assemblies. — Miguel Nicolelis

There are, of course, many reasons to think that brains operate mostly in parallel. Individual neurons are too slow to allow brains to operate in strict serial von Neumann fashion, and ample data suggest that in any given laboratory task (and by extension, any real-world situation) many different parts of the brain are engaged simultaneously. — Gary F. Marcus

Your brain has a trillion neurons and every neuron has ten thousand little dendrites. The system of inter-communication is awe-inspiring. — Don DeLillo

Thinking about the word "coffee" makes you think about the color black and also about breakfast and the taste of bitterness, that's a function of a cascade of electrical impulses rocketing around a real physical pathway inside your brain, which links a set of neurons that encode the concept of coffee with others containing the concepts of blackness, breakfast, and bitterness. That much scientists know. But how exactly a collection of cells could "contain" a memory remains among the deepest conundrums of neuroscience. — Joshua Foer

I thought if I stared a little longer I could see right inside his head, to his brain, and I don't know why that turned me on so much. I wanted to witness the workings of his mind, the firing synapses, information traveling safely inside neurons to different parts of his body. A few made it to his hand, and they must have told him to keep holding mine because he didn't let go. — S. Walden

The structure of the human brain is enormously complex. It contains about 10 billion nerve cells (neurons), which are interlinked in a vast network through 1,000 billion junctions (synapses). The whole brain can be divided into subsections, or sub-networks, which communicate with each other in a network fashion. All this results in intricate patterns of intertwined webs, networks of nesting within larger networks. — Fritjof Capra

All of our memories are, like S's, bound together in a web of associations. This is not merely a metaphor, but a reflection of the brain's physical structure. The three-pound mass balanced atop our spines is made up of somewhere in the neighborhood of 100 billion neurons, each of which can make upwards of five to ten thousand synaptic connections with other neurons. A memory, at the most fundamental physiological level, is a pattern of connections between those neurons. Every sensation that we remember, every thought that we think, transforms our brains by altering the connections within that vast network. By the time you get to the end of this sentence, your brain will have physically changed. — Joshua Foer

The overall picture that has emerged from the study of the compassionate brain is that there is no empathy center with empathy neurons, but complex patterns of activation and modulation that depend on perceivers' interpretation of the straits of another person and the nature of their relationship with the person. — Steven Pinker

There are 100 billion neurons in the adult human brain, and each neuron makes something like 1,000 to 10,000 contacts with other neurons in the brain. Based on this, people have calculated that the number of permutations and combinations of brain activity exceeds the number of elementary particles in the universe. — Vilayanur S. Ramachandran

As a bio major, I figured "free will" meant chemicals in your brain telling you what to do, the molecules bouncing around in a way that felt like choosing but was actually the dance of little gears
neurons and hormones bubbling up into decisions like clockwork. You don't use your body; it uses you. — Scott Westerfeld

At such rare times you can feel the electrically charged neurons of the prefrontal brain realigning themselves like iron fillings drawn by a magnet. — Joyce Carol Oates

It is not customary to refer to organisms when we talk about brain
and mind. It has been so obvious that mind arises from the activity
of neurons that only neurons are discussed as if their operation
could be independent from that of the rest of the organism. But as I
investigated disorders of memory, language, and reason in numerous
human beings with brain damage, the idea that mental activity, from
its simplest aspects to its most sublime, requires both brain and body
proper became especially compelling. — Antonio R. Damasio

Most of the different types of cells in our body die and are replaced every few weeks or months. However, neurons, the primary cell of the nervous system, do not multiply (for the most part) after we are born. That means that the majority of the neurons in your brain today are as old as you are. This longevity of the neurons partially accounts for why we feel pretty much the same on the inside at the age of 10 as we do at age 30 or 77. — Jill Bolte Taylor

The brain is the most complicated organ in the universe. We have learned a lot about other human organs. We know how the heart pumps and how the kidney does what it does. To a certain degree, we have read the letters of the human genome. But the brain has 100 billion neurons. Each one of those has about 10,000 connections. — Francis Collins

We are all now connected by the Internet, like neurons in a giant brain. — Stephen Hawking

A good idea is a network. A specific constellation of neurons - thousands of them - fire in sync with each other for the first time in your brain, and an idea pops into your consciousness. — Steven Johnson

We do not perceive what is "out ther," rather we perceive what is "in here." Our senses can only inform us of their own status. They can inform us of the elesctrical status of neurons or the physical or the chemical status of the receptors. The outside world is never taken into our consciousness. The outside world is rather our own creation, psychologically synthesized from the mass of sensations that envelope us. In many respects, the ultimate question that perception must ask was stated by John Stuart Mill in 1865. He asked, "What is it we mean, or what is it which leads us to say, that the objects we perceive are external to us, and not a part of our own thoughts?" That remains, perhaps, the ultimate, unresolved perceptual puzzle. — Stanley Coren

Brain cells are normally not sensitive to light. So by introducing light-sensitive proteins into specific types of neurons, we can now selectively control that specific type of neuron by shining light in the brain. — Feng Zhang

mother instilled in me a deep respect for the potential of the human brain, and that respect has deepened over the years to an attitude I can only describe as awe. Every time I open a child's head and see a brain, I marvel at the mystery: This is what makes every one of us who we are. This is what holds all our memories, all our thoughts, all our dreams. This is what makes us different from each other in millions of ways. And yet if I could expose my brain and your brain and place them side by side, you wouldn't be able to tell the difference - even though we might be very different people. That still amazes me. Inside each human brain are billions and billions of complex interconnections, neurons and synapses, which science has only barely begun to understand. When you add to that the mystery of mind — Ben Carson

Based on the above analyses, it is reasonable to expect the hardware that can emulate human-brain functionality to be available for approximately one thousand dollars by around 2020. As we will discuss in chapter 4, the software that will replicate that functionality will take about a decade longer. However, the exponential growth of the price-performance, capacity, and speed of our hardware technology will continue during that period, so by 2030 it will take a village of human brains (around one thousand) to match a thousand dollars' worth of computing. By 2050, one thousand dollars of computing will exceed the processing power of all human brains on Earth. Of course, this figure includes those brains still using only biological neurons. — Ray Kurzweil

What makes aerobic exercise so powerful is that it's our evolutionary method of generating that spark. It lights a fire on every level of your brain, from stoking up the neurons' metabolic furnaces to forging the very structures that transmit information from one synapse to the next. — John J. Ratey

There are little wisps of jelly in a living brain. Deagle knows this well: neurons, transmitting signals - and the soul, so to speak, is somewhere in those flashes. He heard once on a science program that the spindle cell - present in humans, whales, some apes, elephants - may be at the heart of what we call our "selves."
What we recognize in the mirror - that thread we follow through time that we call "me"? It's just a diatom, a paramecium, a bit of ganglia that branches and shudders assertively. A brief brain orgasm, like lightning.
In short, it's all chemicals. You can regiment it easily enough: fluoxetine, sertraline, paroxetine, escitalopram, citalopram - the brain can be washed clean, and you can reset yourself, Ctrl+Alt+Del. You don't have to be a prisoner of your memories and emotions. — Dan Chaon

Our minds have the incredible capacity to both alter the strength of connections among neurons, essentially rewiring them, and create entirely new pathways. (It makes a computer, which cannot create new hardware when its system crashes, seem fixed and helpless). — Susannah Cahalan

Don't worry dreams aren't real. They're just neurons firing randomly in your brain. — Katherine Applegate

Throughout our lifetimes, we are constantly regenerating new brain cells in the hippocampus, a process called neurogenesis. New stem cells are constantly being born in the hippocampus that ultimately differentiate into fully functional neurons. — David Perlmutter

The glial-derived neurotrophic factor (GDNF) that he referred to is a brain growth factor. It functions like a growth-promoting fertilizer in the brain. GDNF is made by glial cells, one of the major types of cells in the brain. Fifteen percent of our brain cells are neurons; the other 85 percent are glial cells. — Norman Doidge

There is no scientific theory that could lead us from a detailed map of every single neuron in someone's brain to a conscious experience. We don't even have the beginnings of a theory whose conclusion would be such a system is conscious. — Stuart J. Russell

Buddhist say that thoughts are like drops of water on the brain; when you reinforce the same thought, it will etch a new stream into your consciousness, like water eroding the side of a mountain. Scientist confirm this bit of folk wisdom: our neurons break connections and form new pathways all the time. Even if you've been programmed to fear death, that particular pathway isn't set in stone. Each of us is responsible for seeking out new knowledge and creating mental circuits. — Caitlin Doughty

Thinking about him requires so little effort that she can do it while performing mindless activities. Soaping the dishes, replaiting Clare Kelley's hair, drying the dishes. The part of her brain that plays his ongoing reel is unconnected to the neurons and synapses that control things like conscious thought and logic. Ben turning to her at a party. Ben turning to her. Ben turning. What human being deserves to be the nucleus of such high esteem? Certainly not Benjamin, middle name Hal, last name Allen. Five-nine in boots. Who has a car that doesn't start on cold mornings, an unfinished screenplay, a law degree he doesn't use, a romantic's tendency to save movie stubs, and a mannered, unsmiling wife. — Marie-Helene Bertino

Shaped a little like a loaf of French country bread, our brain is a crowded chemistry lab, bustling with nonstop neural conversations. Imagine the brain, that shiny mound of being, that mouse-gray parliament of cells, that dream factory, that petit tyrant inside a ball of bone, that huddle of neurons calling all the plays, that little everywhere, that fickle pleasuredome, that wrinkled wardrobe of selves stuffed into the skull like too many clothes into a gym bag. - Diane Ackerman — Ray Kurzweil

Power dynamic operates in emotional contagion, determining which person's brain will more forcefully draw the other into its emotional orbit. Mirror neurons are leadership tools: Emotions flow with special strength from the more socially dominant person to the less. One reason is that people in any group naturally pay more attention to and place more significance on what the most powerful person in that group says and does. That amplifies the force of whatever emotional message the leader may be sending, making her emotions particularly contagious. As I heard the head of a small organization say rather ruefully, When my mind is full of anger, other people catch it like the flu. — Daniel Goleman

The fruit fly has roughly 150,000 neurons in the brain. — Michio Kaku

The brain is its own galaxy, with more cells than stars in the Milky Way. The most powerful organ in the body, it rivals any supercomputer, processing 90,000 to 150,000 thoughts a day through billions of neurons and trillions of synaptic connections. Now that we have found a pathway to retrieving memories that before were inaccessible, we are perfecting its function too quickly. — Gwendolyn Womack

Though advances in imaging technology have allowed neuroscientists to grasp much of the basic topography of the brain, and studies of neurons have given us a clear picture of what happens inside and between individual brain cells, science is still relatively clueless about what transpires in the circuitry of the cortex, the wrinkled outer layer of the brain that allows us to plan into the future, do long division, and write poetry, and which holds most of our memories. — Joshua Foer

Our brain is a circuit board with neurons and terminals ready to be wired. We are born free, then programmed to obey our parents, to tell the truth, pass exams, pursue and achieve, love and propagate, age and fade unfulfilled and uncertain what it has all been for. We swallow the operating system with our mother's milk and sleepwalk into the forest of consumer illusion craving shoes, houses, cars, magazines, experiences that endorse our preconceived dreams and opinions. We grow into our parents. We becomes clones, robots, matchstick men thinking and saying the same, feeling the same, behaving the same, appreciating in books and films and art shows those things we already recognize and understand. — Chloe Thurlow

In short, the brain has the power to recruit healthy neurons to perform the function of the damaged ones. Neuroplasticity enables the brain to reassign jobs. — Richard J. Davidson

If you meet somebody and are attracted to someone, and the exquisite neurons in your brain and her brain intermesh properly, then things can be wonderful. It's not like homework. You don't have to work at the relationship. — Woody Allen

As the blood poured from his tattered heart into the open air and his brain suffocated, all those incomplete thoughts of Wittgenstein decayed with the dying neurons. Neural connections in the gray matter storing memories and ideas in their ordered configurations fired across the gaps, last gaps of mental life. Thoughts on Truth and Will were erased as flesh sloshed soft and limp against alabaster, no more than rotting human fruit. — Janna Levin

In the artifacts that are conscious, memories of vanished lives still flicker. Tissues that were changed without dying hold the moment that a boy heard his sister was leaving home. They hold multiplication tables. They hold images of sexuality and violence and beauty. They hold the memories of flesh that no longer exists. They hold metaphors: mitochondria, starfish, Hitler's-brain-in-a-jar, hell realm. They dream. Structures that were neurons twitch and loop and burn and dream. Images and words and pain and fear, endless. — James S.A. Corey

Anxiety is nothing more than prolonged fear. It comes with prolonged chemical release that does incalculable damage to your neurons over time. — Toni Sorenson

Life and consciousness are the two great mysteries. Actually, their substrates are the inanimate. And how do you get from neurons shooting around in the brain to the thought that pops up in your head and mine? There's something deeply mysterious about that. And if you're not struck by the mystery, I think you haven't thought about it. — Charles Krauthammer

The entire universe - for one thing - only exists in your perceptions. That's all you're gonna see of it. To all practical intents and purposes this is purely some kind of lightshow that's being put on in the kind of neurons in our brain. The whole of reality. — Alan Moore

Love makes you crazy. Love crawls into your brain and plays games with your neurons. All the things you thought you knew about yourself fly out the window when love flies in. — Barbara Bretton

An illustration I use to get people to understand it is this: I'll ask major corporate audiences: Why don't you just take all your traditional beliefs about organizations, and apply them to the neurons in your brain? — Dee Hock

The human brain is a marvel. A mere 20 watts of energy are required to power the 22 billion neurons in a brain that's roughly the size of a grapefruit. To field a conventional computer with comparable cognitive capacity would require gigawatts of electricity and a machine the size of a football field. — John E. Kelly III

A typical neuron makes about ten thousand connections to neighboring neurons. Given the billions of neurons, this means there are as many connections in a single cubic centimeter of brain tissue as there are stars in the Milky Way galaxy. — David Eagleman

A lizard never thinks something is wrong with the world, even as it watches its young get eaten alive. It doesn't tell itself "something is wrong with the world," because it doesn't have enough neurons to imagine the world being other than what it is. It doesn't expect a world in which there is no predators, so it doesn't condemn the world for falling short of expectations. it doesn't condemn itself for failing to keep its offspring alive. Humans expect more, and we do something about it. That's why we end up focused on our disappointments instead of saluting our accomplishments. — Loretta Graziano Breuning

When your brain is always engaged, when your neurons are always firing, when you find yourself in a continual mode of reacting and responding, instead of steering and directing, the best and brightest solutions that you are capable of producing rarely see the light of day. — Jeff Davidson

Anthony watched him, dumbfounded, and then turned to Lucy. "What have you done with Zack's brain?"
Lucy stood to follow Zack. "What brain? I don't think he has one. I think he's just one giant exposed nerve ending. I swear sometimes at night, I can hear his neurons snapping like popcorn. — Jennifer Crusie

Consciousness is somehow a by-product of the simultaneous, high frequency firing of neurons in different parts of the brain. It's the meshing of these frequencies that generates consciousness, just as tones from individual instruments produce the rich, complex, & seamless sounds of a symphony orchestra — Francis Crick

Rope-a-dope boxers and quarterbacks and hockey enforcers continue to shake off concussions on the theory of no blood, no harm. But each concussion effectively softens up the brain and ups the chances of more concussions. After multiple blows, neurons start to die and spongy holes open up; people's personalities then disintegrate, leaving them depressed, diminished, suicidal. Four centuries have passed, but macho modern athletes* might as well trade pads for armor and go joust with — Sam Kean

Every thought, feeling, and emotion creates a molecule known as a neuropeptide. Neuropeptides travel throughout your body and hook onto receptor sites of cells and neurons. Your brain takes in the information, converts it into chemicals, and lets your whole body know if there's trouble in the world or cause for celebration. Your body is directly influenced as these molecules course through the bloodstream, delivering the energetic effect of whatever your brain is thinking and feeling. — Deepak Chopra

The brain immediately confronts us with its great complexity. The human brain weighs only three to four pounds but contains about 100 billion neurons. Although that extraordinary number is of the same order of magnitude as the number of stars in the Milky Way, it cannot account for the complexity of the brain. The liver probably contains 100 million cells, but 1,000 livers do not add up to a rich inner life. — Gerald Fischbach

To take an example closer to home, consider the fact that every few years your body replaces most of the atoms that comprise you. In spite of this, you remain yourself in all the ways that matter to you. One atom is as good as any other if it's playing the same functional role in your molecular makeup. The same story should hold for the brain: if a mad scientist were to replace each of your neurons with a functionally equivalent micromachine replica, you should come out of the procedure feeling no less your own true self than you had at the outset. By this principle, an artificial system that used the same functional architecture as an intelligent, living brain should be likewise intelligent - and not just contrivedly so, but actually, truly intelligent. — Jeff Hawkins

During the twentieth century, neuroscientists and psychologists also came to more fully appreciate the astounding complexity of the human brain. Inside our skulls, they discovered, are some 100 billion neurons, which take many different shapes and range in length from a few tenths of a millimeter to a few feet.4 A single neuron typically has many dendrites (though only one axon), and dendrites and axons can have a multitude of branches and synaptic terminals. The average neuron makes about a thousand synaptic connections, and some neurons can make a hundred times that number. — Nicholas Carr

When neurons "talk" to each other clearly, our brain is able to make sense of our lives. We make our wisest decisions when there is nothing obstructing these lines of communication. — Toni Sorenson

The human brain, it has been said, is the most complexly organised structure in the universe and to appreciate this you just have to look at some numbers. The brain is made up of one hundred billion nerve cells or "neurons" which is the basic structural and functional units of the nervous system. Each neuron makes something like a thousand to ten thousand contacts with other neurons and these points of contact are called synapses where exchange of information occurs. And based on this information, someone has calculated that the number of possible permutations and combinations of brain activity, in other words the numbers of brain states, exceeds the number of elementary particles in the known universe. — V.S. Ramachandran

If there is to be a resolution to the mystery of how mind relates to matter, it will emerge from explaining the data of the human brain in terms of these laws-laws capable of giving rise to a very different view of the causal efficacy of human consciousness. Quantum mechanics makes it feasible to describe a mind capable of exerting effects that neurons alone cannot. — Jeffrey M. Schwartz

Unlike the heart or kidney, which have a small, defined set of cell types, we still do not have a taxonomy of neurons, and neuroscientists still argue whether specific types of neurons are unique to humans. But there is no disputing that neurons are only about 10 percent of the cells in the human brain. — Thomas R. Insel

The neurons that do expire are the ones that made imitation possible. When you are capable of skillful imitation, the sweep of choices before you is too large; but when your brain loses its spare capacity, and along with it some agility, some joy in winging it, and the ambition to do things that don't suit it, then you finally have to settle down to do well the few things that your brain really can do well
the rest no longer seems pressing and distracting, because it is now permanently out of reach. The feeling that you are stupider than you were is what finally interests you in the really complex subjects of life: in change, in experience, in the ways other people have adjusted to disappointment and narrowed ability. You realize that you are no prodigy, your shoulders relax, and you begin to look around you, seeing local color unrivaled by blue glows of algebra and abstraction. — Nicholson Baker

Whatever happens to a baby contributes to the emotional and perceptual map of the world that its developing brain creates. As my colleague Bruce Perry explains it, the brain is formed in a "use-dependent manner."5 This is another way of describing neuroplasticity, the relatively recent discovery that neurons that "fire together, wire together." When a circuit fires repeatedly, it can become a default setting - the response most likely to occur. If you feel safe and loved, your brain becomes specialized in exploration, play, and cooperation; if you are frightened and unwanted, it specializes in managing feelings of fear and abandonment. As infants and — Bessel A. Van Der Kolk

Your brain is built of cells called neurons and glia - hundreds of billions of them. Each one of these cells is as complicated as a city. — David Eagleman

When the brain is working to remember something, similar patterns of neurons fire as they did during the perception of the original event. These networks are linked, and each time we revisit them, they become stronger and more associated. But they need the proper retrieval cues
words, smells, images
for them to be brought back as memories — Susannah Cahalan

NEUROLOGY: NEW BRAIN NEURONS FOUND TO OVERWRITE OLD MEMORIES — Anonymous

But then human beings only understood each other in the first place by pretending. You didn't make predictions about people by modeling the hundred trillion synapses in their brain as separate objects. Ask the best social manipulator on Earth to build you an Artificial Intelligence from scratch, and they'd just give you a dumb look. You predicted people by telling your brain to act like theirs. You put yourself in their place. If you wanted to know what an angry person would do, you activated your own brain's anger circuitry, and whatever that circuitry output, that was your prediction. What did the neural circuitry for anger actually look like inside? Who knew? The best social manipulator on Earth might not know what neurons were, and neither might the best Legilimens. — Eliezer Yudkowsky

In the last few years, we've learned that the formation and maintenance of categories have their roots in known biological processes in the brain. Neurons are living cells, and they can connect to one another in trillions of different ways. These connections don't just lead to learning - the connections are the learning. The number of possible brain states that each of us can have is so large that it exceeds the number of known particles in the universe. The implications of this are mind-boggling: Theoretically, you should be able to represent uniquely in your brain every known particle in the universe, and have excess capacity left over to organize those particles into finite categories. Your brain is just the tool for the information age. — Daniel J. Levitin